diff --git a/README.md b/README.md
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+++ b/README.md
@@ -389,12 +389,9 @@ An organized reading list for illustrating the patterns behind scalable, reliabl
 		* [Couchbase Ecosystem at LinkedIn](https://engineering.linkedin.com/blog/2017/12/couchbase-ecosystem-at-linkedin)
 		* [SimpleDB at Zendesk](https://medium.com/zendesk-engineering/resurrecting-amazon-simpledb-9404034ec506)
 		* [Espresso: Distributed Document Store at LinkedIn](https://engineering.linkedin.com/espresso/introducing-espresso-linkedins-hot-new-distributed-document-store)
-	* [Graph Databases](https://www.ibm.com/developerworks/library/cl-graph-database-1/index.html)
-		* [Handling Billions of Edges in a Graph Database](https://www.infoq.com/presentations/graph-database-scalability)
-		* [Neo4j case studies with Walmart, eBay, AirBnB, NASA, etc](https://neo4j.com/customers/)
-		* [FlockDB: Distributed Graph Database for Storing Adjancency Lists at Twitter](https://blog.twitter.com/engineering/en_us/a/2010/introducing-flockdb.html)
-		* [JanusGraph: Scalable Graph Database backed by Google, IBM and Hortonworks](https://architecht.io/google-ibm-back-new-open-source-graph-database-project-janusgraph-1d74fb78db6b)
-		* [Amazon Neptune](https://aws.amazon.com/neptune/)
+	* [Graph Databases](https://www.eecs.harvard.edu/margo/papers/systor13-bench/)
+		* [FlockDB: Distributed Graph Database at Twitter](https://blog.twitter.com/engineering/en_us/a/2010/introducing-flockdb.html)
+		* [TAO: Distributed Data Store for the Social Graph at Facebook](https://www.cs.cmu.edu/~pavlo/courses/fall2013/static/papers/11730-atc13-bronson.pdf)
 	* [Datastructure Databases (Redis, Hazelcast)](https://db-engines.com/en/system/Hazelcast%3BMemcached%3BRedis)
 		* [Scaling Redis at Twitter](http://highscalability.com/blog/2014/9/8/how-twitter-uses-redis-to-scale-105tb-ram-39mm-qps-10000-ins.html)
 		* [Scaling Job Queue with Redis at Slack](https://slack.engineering/scaling-slacks-job-queue-687222e9d100)